#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=1e5+10;
inline int read(){
    int f=1,ans=0;
    char c=getchar();
    while(c>'9'||c<'0'){
        if(c=='-') f=-1;
        c=getchar();
    }
    while(c>='0'&&c<='9'){
        ans=ans*10+c-'0';
        c=getchar();
    }
    return ans*f;
}
int main(){
    freopen("arena.in","r",stdin);
    freopen("arena.out","w",stdout);
    return 0;
}
